What is one more than 7?
Incorrect answer: 6
One more is not the same as making another equal group. One more than 4 is 5, not 8. Use one extra counter to make the difference visible.
Mixing up one more and one less
More and less describe opposite directions. Start at the number, then make exactly one step.
The correction
8
The next counting number after 7 is 8.
- Make or draw the starting group.
- Add one object for one more, or remove one for one less.
- Count the new group and connect it to the neighboring number.
Try the reasoning in another example
What is one less than 6?
- Start with six counters.
- Remove one; count the five that remain.
Answer: 5
Explain why each step preserves the quantity or relationship. If you can compute the answer but cannot explain the step, revisit the model before adding more questions.
The short check below reuses the first example as a retrieval question and adds a second question. It checks this method; it does not establish a grade level.
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